7-16
COMPONENTS TEST PROCEDURES RESULTS
CIRCUIT BOARD
TOUCH KEY
BOARD
See page 7-19 for “CHECKOUT PROCEDURES FOR THE CIRCUIT BOARD”
NOTE: A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS
SERVICED FOR ANY REASON.
Measure the resistance between terminal
pins of connector KEY CON.
NOTE:
When reconnecting the FPC connector,
make sure that the holes on the FPC
connector are properly engaged with hooks
on the plastic fastener.
MATRIX CIRCUIT FOR
TOUCH KEY BOARD
CONNECTOR(KEY CON)
Figure 26
Resistance
value
When When not
touched touched
Less than More than
400 ohms 1 mega ohm
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